RED
BLACK
0V
+4 to +25V d.c.
DIMENSIONS All dimensions in mm (inches)
QM 100V is an easy to mount LCD digital panel meter.
To install the meter, the user need only
drill a single 5.5mm / hole in the panel. The module is tted to the panel by locating its threaded stud through the hole, tting the washer and tightening the nut
provided. The module's connecting wires pass through the hollow stud into the target application for connection.
The module features a 4 to 25V measurement range with 100mV resolution and is powered from the signal it is
measuring. Only valid readings are displayed; the module indicates "LO" at voltages below 4V and "HI" at voltages above 25V.
"
A rubber seal is included, providing splashproof
protection for the unit when tted to the meter during installation.
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QM 100V Single Hole Mounting 2-Wire Meter
REAR VIEW
Shown Actual Size
21.40 (0.84)
10.70
(0.42)
5.00
(0.20)
10.70
(0.42)
43.50 (1.71)
21.75 (0.85)
21.75 (0.85)
SAFETY
To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module’s wires must not exceed 60Vd.c. The user must ensure that the
incorporation of the meter into the user’s equipment conforms to the relevant sections of BS EN 61010 (Safety Requirements for Electrical Equipment for
Measuring, Control and Laboratory Use).
Stock Number
Easy Mounting V oltmeter QM 100V
Specication Min. Typ. Max. Unit
)tnuoc1±(V2.0)rorrellarevo(ycaruccA
tnuoc1±ytiraeniL
Valid displayed reading* 4.0 25.0 V d.c.
.c.dVm001noituloseR
ces/elpmas3etarelpmaS
Operating temperature range 0 50 °C
.c.dV053
egatlovylppuS
Am3tnerrucylppuS
* At voltages below 4.0V d.c., the LCD will display and will ultimately go blank.
At Voltages in excess of 25.0V d.c., the LCD will display .
Do NOT exceed 50V d.c., as this may damage the meter.
The module includes reverse polarity protection up to 30V for up to 30 seconds.
Operation and accuracy at voltages above 25.0V or below 4.0V are not specied.
LO
HI
APPLICATION
Reading when Vin < 4V,
before display switches o.
Reading when Vin > 25V.
Module thickness: 5.5mm (0.22")
CAL
PO Box 770, Londonderry, NH 03053 1-800-821-0023
www.martelcorp.com
WARNING! In automotive applications or where an alternator
is present and there is the possibility of a transient voltage
spike it is recommended to use some type of transient
voltage suppressor (TVS) to protect the meter.
Washer
EMV 1200-40
Panel
2 wires - 30cm (12.0)
Nut
9.0
(0.35)
Seal
QM100V
FITTING THE EMV 1200-40
Drill a 5.5mm / " hole in the panel.
not to overtighten the nut as this may damage the meter.
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Fit seal to the rear of the module. Fit the module to
the panel by passing its screw threaded stud and the wires through the hole, tting the
washer and tightening the nut provided. Take care not to trap either of the connecting
wires. Do
FITTING THE QM100V
TVS ZENER DIODE
Martel Part Number: 80311
Digikey (www.digikey.com)
Part Number: 1N6287AGOS-ND
METER
TVS DIODE
+–
Single Hole Mounting
12.5mm / 0.5" LCD Digit Height
Reverse Polarity Protection
2-Wire Operation
V d.c. Full Scale Reading
4to25
Splashproof
(1 pages)
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